Computers can be classified into various classes according to on the basis of working principle, on the basis of size, on the basis of brand. On the basis of brand computers are classified in to three types IBM PC, IBM compatible, Apple/Macintosh.
The computers manufactured by IBM (International Business Machine) company are called IBM computers. The microcomputers of IBM companies are called IBM PC. IBM is one of the leading companies in computer industry. Computers developed on the principle of IBM computers are called IBM Compatible. It can perform all the tasks that an IBM computer does. They are less expensive than original (IBM) computers. In others words, a personal computers manufactured by the Apple Companies are called Apple Computers. They are specially used in Desktop-Designing. They are quite expensive than IBM and IBM Compatible. The operating system and other peripherals are completely different then IBM and IBM Compatibles.
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